Options: they emit light of a constant intensity, their distance from the earth does not change with time, they are very far away from the earth resulting in decrease in intensity of light, they are nearer to earth and hence we receive a greater amount of light and, therefore minor variations in the intensity are not noticeable

Options: help the government in the formulation of policy, exercise effective control over government on a regular and continuing basis, ensure that the parliament strictly adheres to the provision of the constitution and the prescribed parliamentary procedure, both (a) and (b)